On Wed, 03 Jul 2013 21:04:00 +0200 cvb@kruemel.org wrote:

Hi, I have a short and hopefully simple question: On

https://raid.wiki.kernel.org/index.php/Growing

there is a section on expanding existing partitions. Does the procedure 
described there also apply to RAID 10 arrays?

I'm asking, because the section above says explicitly that it only 
applies to RAID level 1/4/5/6 arrays. The section on extending 
partitions is silent on that point...

I have a RAID 10 (software) array here, consisting of 4 disks. As one 
of the disks is a bit flaky, I'm thinking of replacing the (all) disks, 
maybe with bigger ones - if that should work.

There are two dimensions for growing an array - it is good to be explicit.
I think you are just talking about making the devices bigger without
increasing the number of devices.
This possible for RAID10 as long as it uses a 'near' or 'offset' layout.  It
is not support for 'far' layout RAID10.

NeilBrown